Comment on 12.8

[Eric Pederson]

After reading the special note for Ruby programmers I thought I would mention that Scala has a Stream class that is very similar to the Clojure lazy sequence.

Here's a Scala version of the rrange function from 12.3:

  def rrange(start: Int, end: Int): Stream[Int] =

    if (start > end) Stream.empty[Int]

    else

      start #:: rrange(start + 1, end)

[Eric Pederson]

Also, Scala has a whole set of immutable collection classes (besides Stream) that implement structural sharing.